Management log in system

Does anyone know of a management login system. A customer wants one for his website so a user can sign up and get access and on access be diverted to a page with his account on only it will display messages about work in progress and designs etc relating to work he ordered. This is a page just for him to view. Other people who login will be directed to their page. So all people who log in will be sent to their page and will not be able to see other pages.

Thanks in advance